Yumiko Abe , better known by her ring name Yumi Ohka , is a Japanese professional wrestler. Originally trained by the now defunct JDStar promotion, Ohka now works for Oz Academy and Pro Wrestling Wave. She is a former two-time Wave Single Champion, while also being a former Oz Academy Tag Team Champion and Wave Tag Team Champion. She is the managing director of Zabun Co., Ltd., which owns Pro Wrestling Wave.

Oz Academy is a Japanese joshi puroresu or women's professional wrestling promotion founded by Mayumi Ozaki. The promotion's full official name is Oz Academy Women's Professional Wrestling . In addition to the contracted members of the roster, Oz Academy has also employed some of the top freelancers in all of joshi puroresu, including Ayumi Kurihara, Hiroyo Matsumoto, Manami Toyota and Tomoka Nakagawa. The promotion has a television deal with Gaora.